Factor the two halves of the horizontal cut into shared modules so each
can be viewed alone (`plan_up` = deck/screen, `plan_down` = cavity),
while `plan` keeps the exploded combo. Cut height and gap are now the
`plan_z` / `plan_explode` params.
New `show="plan"` lifts the deck/screen half off the cavity half so the
board layout reads at a glance — standoffs, corner posts, ports, and the
internal FPC clearance. Tunable via `plan_z` and `explode`.
The ribbon accommodation must not be visible from outside. Drop the cut
below the bezel lip so the flex folds back into the cavity with no notch
breaking the external face.
The screen's flex leaves the LEFT short edge (user's left), so route it
there: an open ribbon bay in the left bezel, the DESPI-C579 breakout in
the cavity below it, and SPI wiring across to the ESP32. Add a modeled
foam gasket, a `show="section"` cutaway of the screen clamp, and
`active_off_x/y` for the panel's off-centre active area.
Typewriter-body OpenSCAD model for the GDEY0579T93 panel and
ESP32-S3-DevKitC-1: glueless screen retention (bezel lip + foam gasket
+ screwed bracket), baseplate-as-chassis board mounting, and a recessed
deck nameplate. Ships render previews, a dimensioned concept drawing,
and just recipes to open/render/export.
